Parametrization for JSON Comparator

[saksmt]

Main idea is for comparator to traverse through JSON applying function with signature (T, T) -> List<Mismatch> to every method.

Conceptual code:

typealias ValueComparator = (expected: JsonNode, actual: JsonNode) -> List<ComparisonMismatch>
val valueComparatorRegistry = mutableMapOf<JsonNodeType, ValueComparator>()

fun compareSameTypedValueNodes(expected: JsonNode, actual: JsonNode, conflicts: MutableList<ComparisonMismatch>) {
  valueComparatorRegistry[expected.nodeType](expected, actual).forEach(conflicts::add)
}

Comparator may also have some interface to accept configuration?